Display screen or portion thereof with transitional graphical user interface



FIG. 1 is a first image of a first embodiment of a display screen or portion thereof with transitional graphical user interface showing our new design;

FIG. 2 is a second image thereof;

FIG. 3 is a third image thereof;

FIG. 4 is a fourth image thereof;

FIG. 5 is a fifth image thereof;

FIG. 6 is a sixth image thereof;

FIG. 7 is a seventh image thereof;

FIG. 8 is an eighth image thereof;

FIG. 9 is a first image of a second embodiment of a display screen or portion thereof with transitional graphical user interface showing our new design;

FIG. 10 is a second image thereof;

FIG. 11 is a third image thereof;

FIG. 12 is a fourth image thereof;

FIG. 13 is a fifth image thereof;

FIG. 14 is a sixth image thereof;

FIG. 15 is a seventh image thereof;

FIG. 16 is an eighth image thereof; and,

FIG. 17 is a ninth image thereof.

The outer perimeter shown in a pair of dashed broken lines in the drawings represents a display screen or portion thereof and forms no part of the claimed design. The remaining dashed broken lines in the drawings illustrate portions of the transitional graphical user interface that form no part of the claimed design.

The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1 through 8 and FIG. 9 through 17 respectively. The process or period in which one image transitions to another image forms no part of the claimed design. 

CLAIM We claim the ornamental design for a display screen or portion thereof with transitional graphical user interface, as shown and described. 